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Application filed by Glowny Instytut GornictwafiledCriticalGlowny Instytut Gornictwa
Priority to PL29749693ApriorityCriticalpatent/PL169416B1/en
Publication of PL297496A1publicationCriticalpatent/PL297496A1/en
Publication of PL169416B1publicationCriticalpatent/PL169416B1/en